Metric ID to TSID (Global index) – After vmstorage finds metric IDs from the first mapping, this one links each metric ID to its TSID . Date to metric ID (Per-day index) – This maps a specific date to metric IDs, so vmstorage can quickly check whether a metric exists on that date. /path/to/vmstorage-data/data/indexdb/ ├── 2026_01/ # Partition IndexDB (YYYY_MM) │ ├── parts.json # List of IndexDB parts for this partition │ ├── 183A9F12C4D8E001/ # IndexDB part directory │ │ ├── metadata.json # Part metadata │ │ ├── items.bin # Index rows payload │ │ ├── lens.bin # Item lengths/offset helpers │ │ ├── index.bin # Block headers │ │ └── metaindex.bin # Top-level lookup index │ └── ...